Classifications

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  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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  • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
  • C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
  • C07D239/72—Quinazolines; Hydrogenated quinazolines
  • C07D239/74—Quinazolines; Hydrogenated quinazolines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to ring carbon atoms of the hetero ring
  • C07D239/76—N-oxides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/47—Quinolines; Isoquinolines
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  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/50—Pyridazines; Hydrogenated pyridazines
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  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/517—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with carbocyclic ring systems, e.g. quinazoline, perimidine
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P19/00—Drugs for skeletal disorders
  • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
  • C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
  • C07D215/16—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D215/48—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
  • C07D215/54—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen attached in position 3
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
  • C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
  • C07D239/72—Quinazolines; Hydrogenated quinazolines
  • C07D239/74—Quinazolines; Hydrogenated quinazolines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to ring carbon atoms of the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
  • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
  • C07D403/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/14—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing three or more hetero rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
  • C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
  • C07D413/10—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a carbon chain containing aromatic rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
  • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
  • C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
  • C07D471/04—Ortho-condensed systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
  • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
  • C07D487/04—Ortho-condensed systems
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  • C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
  • C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
  • C07D491/04—Ortho-condensed systems
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  • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
  • C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
  • C07D513/04—Ortho-condensed systems

Definitions

• the present invention relates to an anti-inflammatory agent, particularly agent for treating arthritis, containing a quinoline or quinazoline derivative and to novel quinoline derivatives or salts thereof useful as an anti-inflammatory agent.
• Arthritis is an inflammatory disease of arthroses. As main examples of arthritis, there are rheumatoid arthritis and its analogous diseases wherein inflammation is observed in arthroses.
• rheumatoid arthritis also referred to as chronic rheumatism
• rheumatoid arthritis is polyarthritis chronica whose main lesion is inflammatory changes in synovial membrane of internal layers of articular capsules.
• Arthritis such as rheumatoid arthritis is progressive and causes articular disorders such as articular deformation, tetany or the like. When an effective treatment is not carried out and the disease worsens, serious physical disorders are often caused.
• steroids such as adrenal cortical hormones (e.g., cortisone, etc.) or the like; non-steroidal anti-inflammatory agents such as aspirin, piroxicam, indometacin or the like; gold preparations such as gold thiomalate or the like; antirheumatic agents such as chloroquine preparations, D-penicillamine or the like; antipodagrics such as colchicine or the like; immunosuppressive agents such as cyclophosphamide, azathioprine, methotrexate, levamisole or the like; or the like.
• drugs using the chemotherapy have problems such as serious side effects, side effects making their long-term use difficult, insufficient efficacy, inefficacy against arthritis which has already produced the symptoms.
• One object of the present invention is to provide a novel anti-inflammatory agent comprising a quinoline or quinazoline derivative.
• Another object of the present invention is to provide novel quinoline or quinazoline derivatives useful as an anti-inflammatory agent.
• Another object of the present invention is to provide processes for producing the above quinoline or quinazoline derivatives.
• the present inventors have found that quinoline or quinazoline derivatives to which an optionally oxidized sulfur atom, oxygen atom or alkylene group is attached to their 2-positions through a methylene group have anti-arthritic activity, anti-inflammatory activity, antipyretic and analgesic activity, anti-IL-1 activity, antigen-responsive T cell growth inhibitory activity and the like and are useful as anti-inflammatory agents.
• the present invention has been completed.
• An anti-inflammatory agent comprising a compound of the formula (I): ##STR2## wherein Y is a nitrogen atom or C--G (wherein G is carboxyl which may be esterified); X is an optionally oxidized sulfur atom, oxygen atom or --(CH 2 ) q -- (wherein q is an integer of 1 to 5); R is an optionally substituted hydrocarbon group or optionally substituted heterocyclic group having a ring-constituting carbon atom attached to X; each of A ring and B ring may optionally have at least one substituent; and k is 0 or 1, or a salt thereof;
• R is an optionally substituted hydrocarbon atom or optionally substituted heterocyclic group having a ring-constituting carbon atom attached to the sulfur atom, and, if necessary, subjecting the resultant to oxidation;
• R is an optionally substituted hydrocarbon group or optionally substituted heterocyclic group having a ring-constituting carbon atom attached to --(CH 2 ) q-1 -- (wherein q is an integer of 1 to 5), and subjecting the resultant to reduction.
• hydrocarbon group represented by R in the formulas (I), (I'), (I-1), (I-2), (III) and (V), there are aliphatic chain hydrocarbon groups, aliphatic cyclic hydrocarbon groups, aromatic hydrocarbon groups and the like.
• the aliphatic chain hydrocarbon groups include straight-chain or branched-chain aliphatic hydrocarbon groups such as alkyl, preferably C 1-10 alkyl, alkenyl, preferably C 2-10 alkenyl, C 2-10 alkynyl and the like.
• alkyl examples include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, 1-ethyl-propyl, hexyl, isohexyl, 1,1-dimethylbutyl, 2,2-dimethyl-butyl, 3,3-dimethylbutyl, 2-ethylbutyl, hexyl, heptyl, octyl, nonyl, decyl and the like.
• alkenyl examples include vinyl, allyl, isopropenyl, 1-propenyl, 2-methyl-1-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-ethyl-1-butenyl, 3-methyl-2-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 4-methyl-3-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl and the like.
• alkynyl examples include ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3-pentynyl, 4-pentynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 4-hexynyl, 5-hexynyl and the like.
• the aliphatic cyclic hydrocarbon groups include saturated or unsaturated aliphatic cyclic hydrocarbon groups such as cycloalkyl, cycloalkenyl, cycloalkadienyl and the like.
• cycloalkyl examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, bicyclo 2.2.1!heptyl, bicyclo 2.2.2!octyl, bicyclo 3.2.1!octyl, bicyclo 3.2.2!nonyl, bicyclo 3.3.1!nonyl, bicyclo 4.2.1!nonyl, bicyclo 4.3.1!decyl and the like.
• cycloalkenyl examples include 2-cyclopenten-1-yl, 3-cyclopenten-1-yl, 2-cyclohexen-1-yl, 3-cyclohexen-1-yl and the like.
• cycloalkadienyl examples include 2,4-cyclopentadien-1-yl, 2,4-cyclohexadien-1-yl, 2,5-cyclohexadien-1-yl and the like.
• the aromatic hydrocarbon groups include monocyclic or condensed polycyclic aromatic hydrocarbon groups.
• Preferable examples thereof include C 6-14 aryl such as phenyl, naphtyl, anthryl, phenanthryl, acenaphthylenyl and the like. Among them, phenyl, 1-naphtyl, 2-naphtyl and the like are preferred.
• the heterocyclic group represented by R in the formulas (I), (I'), (I-1), (I-2), (III) and (V) means an aromatic heterocyclic group, or a saturated or unsaturated non-aromatic heterocyclic group (aliphatic heterocyclic group) each of which has at least one hetero atoms selected from oxygen, sulfur and nitrogen as an atom constituting the ring system (ring-constituting atom).
• the heterocyclic group is attached to a group defined as X above through its ring-constituting carbon atom.
• the aromatic heterocyclic group includes aromatic monocyclic heterocyclic groups, aromatic condensed heterocyclic groups and the like.
• Preferred examples of the aromatic monocyclic heterocyclic groups include furyl, thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, 1,2,3-oxadiazolyl, 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl, furazanyl, 1,2,3-thiadiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, tetrazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl and the like.
• Preferred examples of the aromatic condensed heterocyclic groups include benzofuranyl, isobenzofuranyl, benzo b!thienyl, indolyl, isoindolyl, 1H-indazolyl, benzoimidazolyl, benzoxazolyl, 1,2-benzisoxazolyl, benzothiazolyl, 1,2-benzoisothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, phthalazinyl, naphthyridinyl, purinyl, pteridinyl, carbazolyl, ⁇ -carbolinyl, ⁇ -carbolinyl, ⁇ -carbolinyl, acridinyl, phenoxazinyl, phenothiazinyl, phenazinyl, phenoxathiinyl, thiant
• non-aromatic heterocyclic groups include oxiranyl, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl, tetrahydrofuryl, thiolanyl, piperidyl, tetrahydropyranyl, morpholinyl, thiomorpholinyl, piperazinyl and the like.
• Each of the above aliphatic chain hydrocarbon groups, aliphatic cyclic hydrocarbon groups, aromatic hydrocarbon groups, heterocyclic groups and the like may have at least one, preferably 1 to 3 appropriate substituents.
• substituents include C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, cycloalkyl, aryl, aromatic heterocyclic groups, non-aromatic heterocyclic groups, aralkyl, amino, N-monosubstituted amino, N,N-disubstituted amino, amidino, acyl, carbamoyl, N-monosubstituted carbamoyl, N,N-disubstituted carbamoyl, sulfamoyl, N-monosubstituted sulfamoyl, N,N-disubstituted sulfamoyl, carboxyl, lower alkoxycarbonyl having C 1-6 alkoxy, hydroxyl, C 1-6 alkoxy, C 2-6 alkenyloxy, cycloalkyloxy, aralkyloxy, aryloxy, mercapto, C 1-6 alkylthio
• examples of the esterified carboxyl represented by G include alkyloxycarbonyl and aralkyloxycarbonyl.
• alkyl in the alkyloxycarbonyl examples include C 1-6 alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl and the like.
• the aralkyl in the aralkyloxycarbonyl means alkyl having aryl as a substituent (arylalkyl).
• arylalkyl examples include phenyl, naphthyl and the like.
• the aryl may have the same substituent as that of the aryl represented by R.
• alkyl C 1-6 alkyl is preferable.
• Preferred examples of the aralkyl include benzyl, phenethyl, 3-phenylpropyl, (1-naphthyl)methyl, (2-naphthyl)methyl and the like. Among them, benzyl, phenethyl and the like are more preferred.
• the optionally oxidized sulfur atom represented by X and Z includes thio, sulfinyl and sulfonyl.
• Examples of the leaving group represented by Q 1 in the formula (II) include halogen, preferably chlorine, bromine or iodine; hydroxyl activated by esterification such as organic sulfonic acid residues (e.g., p-toluenesulfonyloxy, methanesulfonyloxy, etc.) and organic phosphoric acid residues (e.g., diphenylphosphoryloxy, dibenzylphosphoryloxy, dimethylphosphoryloxy, etc.); and the like.
• halogen preferably chlorine, bromine or iodine
• hydroxyl activated by esterification such as organic sulfonic acid residues (e.g., p-toluenesulfonyloxy, methanesulfonyloxy, etc.) and organic phosphoric acid residues (e.g., diphenylphosphoryloxy, dibenzylphosphoryloxy, dimethylphosphoryloxy, etc.); and the like.
• halogen atom represented by Q 2 in the formula (IV) examples include chlorine, bromine and iodine.
• the ring A and ring B in the (I), (I'), (I-1), (I-2), (II) and (IV) may have one or more substituents.
• substituents include halogen, nitro, optionally substituted alkyl, optionally substituted hydroxyl, optionally substituted thiol, optionally substituted amino, optionally substituted acyl, optionally esterified carboxyl and optionally substituted aromatic cyclic groups.
• halogen examples include fluorine, chlorine, bromine and iodine.
• fluorine and chlorine are preferred.
• the optionally substituted alkyl may be any of straight-chain, branched-chain or cyclic C 1-10 alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl or the like.
• hydroxyl there are hydroxyl, hydroxyl having an appropriate substituent, particularly a group used as a protecting group for hydroxyl, such as alkoxy, alkenyloxy, aralkyloxy, acyloxy, aryloxy and the like.
• alkoxy examples include C 1-10 alkoxy such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy, pentoxy, isopentoxy, neopentoxy, hexyloxy, heptyloxy, nonyloxy, cyclobutoxy, cyclopentoxy, cyclohexyloxy and the like.
• alkenyloxy examples include C 1-10 alkenyloxy such as allyloxy, crotyloxy, 2-pentenyloxy, 3-hexenyloxy, 2-cyclopentenylmethoxy, 2-cyclohexenylmethoxy and the like.
• alkenyloxy examples include C 1-10 alkenyloxy such as allyloxy, crotyloxy, 2-pentenyloxy, 3-hexenyloxy, 2-cyclopentenylmethoxy, 2-cyclohexenylmethoxy and the like.
• aralkyloxy examples include phenyl-C 1-4 alkyloxy such as benzyloxy, phenethyloxy and the like.
• acyloxy examples include C 2-4 alkanoyloxy such as acetyloxy, propionyloxy, n-butyryloxy, iso-butyryloxy and the like.
• aryloxy examples include phenoxy, 4-chlorophenoxy and the like.
• thiol examples of the optionally substituted thiol
• thiol examples of the optionally substituted thiol
• thiol having an appropriate substituent particularly a group used as a protecting group for thiol, such as alkylthio, aralkylthio, acylthio and the like.
• alkylthio examples include C 1-10 alkylthio such as methylthio, ethylthio, propylthio, isopropylthio, butylthio, isobutylthio, sec-butylthio, tert-butylthio, pentylthio, isopentylthio, neopentylthio, hexylthio, heptylthio, nonylthio, cyclobutylthio, cyclopentylthio, cyclohexylthio and the like.
• aralkylthio examples include phenyl-C 1-4 alkylthio such as benzylthio, phenethylthio and the like.
• acylthio examples include C 2-4 alkanoylthio such as acetylthio, propionylthio, n-butyrylthio, isobutyrylthio and the like.
• amino having 1 or 2 substituents selected from C 1-10 alkyl, C 2-10 alkenyl and an aromatic group for example, methylamino, dimethylamino, ethylamino, diethylamino, dibutylamino, diallylamino, cyclohexylamino, phenylamino, N-methyl-N-phenylamino and the like.
• acyl there are formyl; carbonyl to which C 1-10 alkyl, C 2-10 alkenyl or an aromatic group is attached such as acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, pivaloyl, hexanoyl, heptanoyl, octanoyl, cyclobutanoyl, cyclopentanoyl, cyclohexanoyl, cycloheptanoyl, crotonyl, 2-cyclohexenecarbonyl, benzoyl, nicotinoyl or the like.
• the optionally esterified carboxyl there are carboxyl, alkyloxycarbonyl, aralkyloxycarbonyl and the like.
• alkyl in the alkyloxycarbonyl include C 1-6 alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl and the like.
• the aralkyl in the aralkyloxycarbonyl means alkyl having aryl as a substituent (arylalkyl).
• arylalkyl examples include phenyl, naphthyl and the like. These groups may have the same substituent as that of the above aromatic cyclic group represented by R.
• alkyl C 1-6 alkyl is preferable.
• Preferable examples of the aralkyl include benzyl, phenethyl, 3-phenylpropyl, (1-naphthylmethyl)methyl, (2-naphthyl)methyl and the like. Among them, benzyl and phenethyl are preferred.
• aromatic hydrocarbon groups such as phenyl, naphthyl, anthryl or the like
• aromatic heterocyclic groups such as pyridyl, furyl, thienyl, imidazolyl, thiazolyl or the like.
• the substituent of the A ring and B ring may be at any position in each ring and may be the same or different.
• the number of the substituent is 1 to 4.
• the adjacent substituents may be joined together to form a ring of the formula: --(CH 2 ) m -- or --O--(CH 2 ) n --O-- wherein m is an integer of 3 to 5 and n is an integer of 1 to 3.
• the resulting ring includes 5 to 7 membered rings formed together with carbon atoms of the benzene ring.
• the most preferred example of the compound (I') is ethyl 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2- 2-(1-methyl- imidazol-2-yl)ethyl!quinoline-3-carboxylate.
• the salts of the desired compound (I) of the present invention are preferably pharmaceutically acceptable salts such as salts with inorganic bases, salts with organic bases, salts with inorganic acids, salts with organic acids, salts with basic or acidic amino acids, or the like.
• salts with inorganic bases include salts with alkaline metals such as sodium, potassium or the like; salts with alkaline earth metals such as calcium, magnesium or the like; salts with aluminum; ammonium salts; and the like.
• salts with organic bases include salts with trimethylamine, triethylamine, pyridine, picoline, ethanolamine, diethanolamine, triethanolamine, dicyclohexylamine, N,N'-dibenzylethylenediamine or the like.
• salts with inorganic acids include salts with hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid or the like.
• salts with organic acids include salts with formic acid, acetic acid, trifluoroacetic acid, fumaric acid, oxalic acid, tartaric acid, maleic acid, citric acid, succinic acid, malic acid, methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid or the like.
• Preferred examples of the salts with basic amino acids include salts with arginine, lysine, ornithine or the like.
• Preferred examples of the salts with acidic amino acids include salts with aspartic acid, glutamic acid or the like.
• the above compound (I) can be prepared, for example, as follows.
• the solvent examples include aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), ethers (e.g., dioxane, tetrahydrofuran, dimethoxyethane, etc.), alcohols (e.g., methanol, ethanol, propanol, etc.), ethyl acetate, acetonitrile, pyridine, N,N-dimethylformamide, dimethylsulfoxide, chloroform, dichloromethane, 1,2-dichloroethane, 1,1,2,2-tetrachloroethane, acetone, 2-butanone and mixed solvents thereof.
• aromatic hydrocarbons e.g., benzene, toluene, xylene, etc.
• ethers e.g., dioxane, tetrahydrofuran, dimethoxyethane, etc.
• alcohols e.g., m
• the base examples include alkaline metal salts such as sodium hydroxide, potassium hydroxide, potassium carbonate, sodium carbonate, sodium bicarbonate or the like; silver carbonate (Ag 2 CO 3 ); amines such as pyridine, triethylamine, N,N-dimethylaniline or the like.
• the amount of the base to be used is about 1 to 5 mol per 1 mol of the compound (II).
• This reaction is normally carried out at -20° C. to 150° C., preferably -10° C. to 100° C.
• the quinoline or quinazoline derivative (I-3) thus obtained can be isolated and purified according to known purification and separation methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• This oxidation can be carried out according to a conventional manner using an oxidizing agent such as m-chloroperbenzoic acid, hydrogen peroxide, peresters, sodium metaperiodate or the like.
• an oxidizing agent such as m-chloroperbenzoic acid, hydrogen peroxide, peresters, sodium metaperiodate or the like.
• the compound of the formula (I-5) wherein p is 1 is preferentially produced.
• the compound of the formula (I-5) wherein p is 2 is produced by oxidation of the compound of the formula (I-5) wherein p is 1 when the oxidizing agent is used in excess of the equimolar amount.
• This oxidation is advantageously carried out in a solvent which is inert under reaction conditions such as halogenated hydrocarbons (e.g., methylene chloride, chloroform, dichloroethane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, etc.) and alcohols (e.g., methanol, ethanol, propanol, etc.).
• halogenated hydrocarbons e.g., methylene chloride, chloroform, dichloroethane, etc.
• aromatic hydrocarbons e.g., benzene, toluene, etc.
• alcohols e.g., methanol, ethanol, propanol, etc.
• This reaction is carried out at room temperature or lower, preferably about -50° C. to 20° C. normally for 0.5 to 10 hours.
• the quinoline or quinazoline derivative (I-5) can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the aldehyde derivative (V) are condensed with phosphonium salt (IV) to obtain the compound (VI) which is then subjected to reduction to prepare the compound (I-2).
• the condensation reaction between the compounds (IV) and (V) is carried out in an appropriate solvent in the presence of a base.
• the solvent examples include alcohols (e.g., methanol, ethanol, propanol, etc.), ethers (e.g., ethyl ether, dioxane, tetrahydrofuran, dimethoxyethane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), dichloromethane, 1,2-dichloroethane, N,N-dimethylformamide, dimethylsulfoxide and mixed solvents thereof.
• alcohols e.g., methanol, ethanol, propanol, etc.
• ethers e.g., ethyl ether, dioxane, tetrahydrofuran, dimethoxyethane, etc.
• aromatic hydrocarbons e.g., benzene, toluene, xylene, etc.
• dichloromethane 1,2-dichloroethane
• Examples of the base include alkaline metal hydride (e.g., sodium hydride, potassium hydride, etc.), alkoxides (e.g., sodium ethoxide, sodium methoxide, potassium tert-butoxide, etc.), organic lithium compounds (e.g., methyl lithium, butyl lithium, phenyl lithium, etc.), sodium amide and the like.
• the amount of the base to be used is preferably about 1 to 1.5 mol per 1 mol of the compound (IV).
• This reaction is carried out normally at -50° C. to 100° C., preferably -20° C. to 50° C.
• the reaction time is 0.5 to 20 hours.
• the compound (VI) is obtained as a mixture of (E) and (Z) isomers for the newly formed double bond. After or without separation, the (E) and (Z) isomers each are subjected to reduction to obtain the compound (I-2).
• This reduction is carried out according to conventional methods in a solvent in the presence of a catalyst such as palladium catalysts (e.g., palladium carbon, palladium black, etc.), platinum catalysts (e.g., platinum dioxide, etc.), Raney nickel or the like under an atmosphere of hydrogen.
• a catalyst such as palladium catalysts (e.g., palladium carbon, palladium black, etc.), platinum catalysts (e.g., platinum dioxide, etc.), Raney nickel or the like under an atmosphere of hydrogen.
• the solvent examples include alcohols (e.g., methanol, ethanol, propanol, etc.), ethers (e.g., ethyl ether, dioxane, tetrahydrofuran, dimethoxyethane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), dichloromethane, 1,2-dichloroethane, ethyl acetate, acetonitrile, acetone, 2-butanone, N,N-dimethylformamide, dimethylsulfoxide, and mixed solvents thereof.
• the pressure of hydrogen atmosphere is 1 to 150 atm, preferably 1 to 20 atm.
• the quinoline or quinazoline derivative (I-2) thus obtained can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the starting materials (II) and (IV) in the present invention can be prepared, for example, according to the following process.
• solvent examples include aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), ethers (e.g., dioxane, tetrahydrofuran, dimethoxyethane, etc.), N,N-dimethylformamide, dimethylsulfoxide, chloroform, dichloromethane, 1,2-dichloroethane, 1,1,2,2-tetrachloroethane, acetic acid and the like.
• aromatic hydrocarbons e.g., benzene, toluene, xylene, etc.
• ethers e.g., dioxane, tetrahydrofuran, dimethoxyethane, etc.
• N,N-dimethylformamide dimethylsulfoxide
• chloroform dichloromethane
• 1,2-dichloroethane 1,1,2,2-tetrachloroethane
• acetic acid acetic acid
• the acid examples include Lewis acids (e.g., aluminum chloride, zinc chloride, etc.), p-toluenesulfonic acid, sulfuric acid, trifluoroacetic acid and the like.
• the amount of the acid to be used is preferably about 0.05 to 0.5 mol per 1 mol of the compound (VII).
• This reaction is carried out normally at 20° C. to 200° C., preferably about 30° C. to 150° C.
• the reaction time is 0.5 to 20 hours, preferably 1 to 10 hours.
• the compound (II-1) thus obtained can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the 2-aminobenzophenone derivative (VII) is reacted with the acetoacetic ester derivative (IX) in the presence of an acid to obtain the compound (X).
• the compound (X) is then brominated to prepare the 2-bromomethylquinoline derivative (II-2).
• reaction between the compounds (VII) and (IX) can be carried out in the same manner as in the process D.
• the bromination of the compound (X) can be carried out in an appropriate solvent in the presence of a free-radical initiator according to conventional methods.
• a free-radical initiator examples include halogenated hydrocarbons such as carbon tetrachloride, chloroform, dichloromethane, 1,2-dichloroethane, 1,1,2,2-tetrachloroethane or the like.
• the free-radical initiator examples include benzoyl peroxide, 2,2-azobis(isobutyronitrile) and the like.
• the amount of the free-radical initiator is preferably about 0.001 to 0.01 mol per 1 mol of the compound (X). This reaction is carried out normally at 20° C. to 150° C., preferably about 30° C. to 100° C.
• the reaction time is 0.5 to 20 hours, preferably 1 to 10 hours.
• the compound (II-2) thus obtained can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the 2-aminobenzophenone derivative (VII) is reacted with the halogenoacetonitrile derivative (XI) to prepare the 2-halogenomethylquinazoline derivative (II-3).
• the reaction between the compounds (VII) and (XI) is carried out by using an excess amount of the compound (XI) as a solvent in the presence of an acid.
• the acid there can be used the same acids as those described in the process D.
• the amount of the acid to be used is about 1 to 5 mol, preferably 1 to 2 mol per 1 mol of the compound (VII).
• the reaction time is normally 0.5 to 30 hours, preferably 1 to 10 hours.
• the reaction temperature is normally 20° C. to 200° C., preferably 30° C. to 150° C.
• the quinazoline derivative (II-3) thus obtained can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the 2-aminobenzophenone derivative (VII) is reacted with acetonitrile to prepare the 2-methylquinazoline derivative (XII).
• the compound (XII) is then subjected to bromination to prepare the 2-bromomethylquinazoline derivative (II-4).
• the reaction of the compound (VII) with acetonitrile is carried out in the same manner as in the F method.
• the bromination of the compound (XII) is carried out in the same manner as the bromination of the compound (X) in the process E.
• the quinazoline derivative (II-4) can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• the compounds (II-1), (II-2), (II-3) and (II-4) obtained by the processes D, E, F and G, respectively, are oxidized to prepare the compound (II-5).
• This oxidation is carried out according to the same manner using an oxidizing agent such as m-chloroperbenzoic acid, hydrogen peroxide, peresters, sodium metaperiodate or the like.
• an oxidizing agent such as m-chloroperbenzoic acid, hydrogen peroxide, peresters, sodium metaperiodate or the like.
• the amount of the oxidizing agent to be used is 1 to 5 mol, preferably 1 to 3 mol per 1 mol of the compound (II-1), (II-2), (II-3) or (II-4).
• This oxidation is advantageously carried out in a solvent which is inert under reaction conditions such as halogenated hydrocarbons (e.g., methylene chloride, chloroform, dichloroethane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, etc.) and alcohols (e.g., methanol, ethanol, propanol, etc.).
• halogenated hydrocarbons e.g., methylene chloride, chloroform, dichloroethane, etc.
• aromatic hydrocarbons e.g., benzene, toluene, etc.
• alcohols e.g., methanol, ethanol, propanol, etc.
• This reaction is carried out at -10° C. to 150° C., preferably about 0° C. to 100° C. normally for 0.5 to 10 hours.
• the quinoline 1-oxide derivative or quinazoline 1-oxide derivative (II-5) thus obtained can be isolated and purified by known separation and purification methods such as concentration, concentration under reduced pressure, solvent extraction, crystallization, recrystallization, redistribution, chromatography or the like.
• This reaction is carried out in a solvent such as aromatic hydrocarbons (e.g. benzene, toluene, xylene, etc.), ethers (e.g., tetrahydrofuran, dioxane, dimethoxyethane, etc.), acetonitrile and mixed solvents thereof.
• aromatic hydrocarbons e.g. benzene, toluene, xylene, etc.
• ethers e.g., tetrahydrofuran, dioxane, dimethoxyethane, etc.
• acetonitrile e.g., acetonitrile
• the compound (I-6) is subjected to hydrolysis to prepare the compound (I-7).
• the hydrolysis can be carried out in water or in an aqueous solvent according to the conventional methods.
• Usable aqueous solvent is a mixture of water and an alcohol (such as methanol or ethanol), an ether (such as tetrahydrofuran or dioxane), N,N-dimethylformamide, dimethylsulfoxide, acetonitrile or acetone.
• an alcohol such as methanol or ethanol
• an ether such as tetrahydrofuran or dioxane
• N,N-dimethylformamide dimethylsulfoxide
• acetonitrile or acetone acetone
• the reaction is carried out in the presence of a base such as potassium carbonate, sodium carbonate, sodium hydroxide, potassium hydroxide or lithium hydroxide, or an acid such as hydrochloric acid, sulfuric acid, acetic acid or hydrobromic acid.
• a base such as potassium carbonate, sodium carbonate, sodium hydroxide, potassium hydroxide or lithium hydroxide, or an acid such as hydrochloric acid, sulfuric acid, acetic acid or hydrobromic acid.
• the acid or the base is used in an excess amount (base: 1.2 to 6 equivalents; acid: 2 to 50 equivalents) to the compound (Ia').
• the reaction is usually conducted at about -20° C. to 150° C., preferably about -10° C. to 100° C.
• the compounds and salts thereof provided according to the present invention have anti-inflammatory activity, and antipyretic and analgesic activity. Further, excellent antiarthritic activity was observed in an experimental model of adjuvant arthritis which produces symptoms analogous to those of rheumatoid arthritis in mammals. Furthermore, anti-IL-1 activity and antigen-responsive T cell growth inhibitory activity were observed and these activities suggests action mechanisms of anti-inflammatory activity of the compounds of the present invention.
• the compounds of the present invention have low toxicity. For example, when 300 mg/kg of the compounds prepared in Examples 36, 45, 47, 54 and 64 were administered orally to mice, no mice died. Therefore, the compounds of the present invention are useful as an anti-inflammatory agent, particularly an agent for treating arthritis producing inflammatory symptoms, in humans and other mammals.
• the compound (I) of the present invention is formulated together with a pharmacologically acceptable carrier and administered orally or parenterally as solid preparations such as tablets, capsules, granules, powders or liquid preparations such as syrups, injections or the like.
• the pharmacologically acceptable carrier there can be used various organic or inorganic carrier materials conventionally used as pharmaceutical materials.
• the carriers are formulated as excipients, lubricants, binders or disintegrants in solid preparations; resolvents, solution adjuvants, suspending agents, tonicity agents, buffering agents or soothing agents in liquid preparations; or the like.
• pharmaceutical additives such as antiseptics, antioxidants, colorants, sweetening agents or the like can also be used.
• excipients include lactose, sucrose, D-mannitol, starch, crystalline cellulose, light silicic anhydride and the like.
• Preferred examples of the lubricants include magnesium stearate, calcium stearate, talc, colloidal silica and the like.
• binders include crystalline cellulose, sucrose, D-mannitol, dextrin, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone and the like.
• Preferred examples of the disintegrants include starch, carboxymethylcellulose, calcium carboxymethylcellulose, croscarmellose sodium, carboxymethylstarch sodium and the like.
• resolvents in liquid preparations include water for injection, alcohols, propylene glycol, macrogol, sesame oil, corn oil and the like.
• solution adjuvants include polyethylene glycol, propylene glycol, D-mannitol, benzyl benzoate, ethanol, trisaminomethane, cholesterol, ethanolamine, sodium carbonate, sodium citrate and the like.
• suspending agents include surfactants such as stearyl triethanolamine, sodium lauryl sulfate, laurylaminopropionic acid, lecithin, banzalkonium chloride, benzethonium chloride, glyceryl monostearate or the like; hydrophilic macromolecules such as polyvinyl alcohol, polyvinyl pyrrolidone, carboxymethylcellulose sodium, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose or the like.
• surfactants such as stearyl triethanolamine, sodium lauryl sulfate, laurylaminopropionic acid, lecithin, banzalkonium chloride, benzethonium chloride, glyceryl monostearate or the like
• hydrophilic macromolecules such as polyvinyl alcohol, polyvinyl pyrrolidone, carboxymethylcellulose sodium, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxyprop
• Preferred examples of the tonicity agents include sodium chloride, glycerin, D-mannitol and the like.
• buffering agents include phosphates, acetates, carbonates, citrates and the like.
• Preferred examples of the soothing agents include benzyl alcohol and the like.
• Preferred examples of the antiseptics include paraoxybenzoic esters, chlorobutanol, phenethyl alcohol, dehydroacetic acid, sorbic acid and the like.
• Preferred examples of the antioxidants include sulfites, ascorbic acid and the like.
• the dose of the compound (I) of the present invention varies widely depending upon a particular route of administration, conditions of a particular patient to be treated or the like.
• the daily dose for an adult patient can normally be selected from the range of 5 to 1,000 mg for oral administration and 1 to 100 mg for parenteral administration.
• the compound (I) can be administered in the above daily dose in 1 to 4 divided portions.
• Freund's complete adjuvant (a 0.5% suspension of killed tubercule bacilli in liquid paraffin) (0.05 ml) was injected intradermally into a right hind leg plantar of Lewis rats (male, 7 weeks old, Charles River Japan Inc.) for sensitization.
• a test drug 50 mg/kg was suspended in 5% acacia and administered once a day for 14 days. The administration was started just before the sensitization (Day 0). The volume of the left hind leg and the body weight were measured just before the sensitization (Day 0) and on the 14th day, and the swelling inhibitory rate (%) and the increase rate (%) of body weight based on drug-unadministered rat groups were calculated.
• the volume of a planter part of a right hind leg of Jcl:SD rats (male, 6 weeks old) was measured, and then suspension of a test drug (50 mg/kg) in 5% acacia was administered orally. Then water was administered additionally so that the total amount of administered liquid became 5 ml/rat. After 1 hour, a suspension (0.05 ml) containing 1% carrageenin in physiological saline was injected intradermally into the plantar to induce swelling Winter, C. A. et al; Proc. Soc. Exp. Biol. Med., 111, 544 (1962)!. The volume of the right hind leg was measured again 3 hours after the carrageenin injection, and swelling inhibitory rate was calculated from the difference in the volumes before and after the injection.
• a drug 50 mg/kg suspended in 5% acacia was administered orally to Slc:ICR mice (male, 4 weeks old). After 30 minutes, a 0.02% phenylquinone solution (0.1 ml/10 kg body weight) in 5% ethanol was administered intraperitoneally. Writhing and stretching reactions for 20 minutes after the injection were calculated for each mouse to evaluate analgesic activity of the test drug Siegmund, E. et al.; Proc. Soc. Exp. Biol. Med., 95, 729 (1957)!.
• Rat cartilage cells were prepared according to the known method Fujio Suzuki et al., Sin Seikagaku Jikken Kohza, 18, p.871-875 (1990)! and cultivated in Dulbecco's Medium containing 10% fetal bovine serum. After 8 days, various concentrations of a test drug and IL-1 ⁇ (0.2 ng/ml) were added, and the cells were cultivated for additional 3 days. The amount of extracellular substrates thus produced was determined.
• spleen cells were taken out from unsensitized Lewis rats (male, 8 to 9 weeks old) and irradiated with soft X-rays (20,000 R).
• the results are shown in Table 5.
• the compound of the present invention has inhibitory activity against stimulation of T cell growth by PPD.
• m-Chloroperoxybenzoic acid (85%, 830 mg) was added in small portions under ice-cooling to a solution of ethyl 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2- (1-methylimidazol- 2-yl)thiomethyl!quinoline-3-carboxylate (3.0 g) in dichloromethane (75 ml).
• the reaction mixture was stirred at room temperature for 2.5 hours, washed successively with 5% NaHSO 3 aqueous solution, saturated aqueous solution of sodium bicarbonate and water, and dried (MgSO 4 ). The solvent was distilled off under reduced pressure. The residue was subjected to column chromatography on silica gel.
• m-Chloroperoxybenzoic acid (85%, 2.5 9) was added in small portions under ice-cooling to a solution of ethyl 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2- (1-methylimidazol- 2-yl)thiomethyl!quinoline-3-carboxylate (2.5 g) in dichloromethane (60 ml).
• the reaction mixture was stirred at room temperature for 4 hours, washed successively with 5% NaHSO 3 aqueous solution, saturated aqueous solution of sodium bicarbonate and water, and dried (MgSO 4 ).
• the solvent was distilled off under reduced pressure. The residue was subjected to column chromatography on silica gel.
• Ethyl (E)- and (Z)-6,7-dimethoxy-4-(3,4-dimethoxy- phenyl)-2- 2-(1-methylimidazol-2-yl)vinyl!quinoline-3-carboxylates each were subjected to hydrogenation under an atmosphere of hydrogen at 1 atm in ethanol/tetrahydrofuran (1:1, v/v) in the presence of 5% palladium-carbon to obtain ethyl 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2- 2-(1-methylimidazol-2-yl)ethyl!quinoline-3-carboxylate. It was recrystallized from ethanol.

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• 1993
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